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#! /usr/bin/env python3
# -*- coding: utf-8 -*-
# COPYRIGHT NOTICE STARTS HERE
# Copyright 2019 © Samsung Electronics Co., Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# COPYRIGHT NOTICE ENDS HERE
import argparse
import datetime
import hashlib
import logging
import os
import sys
import timeit
from retrying import retry
import http_downloader
import http_file
log = logging.getLogger(__name__)
class NpmDownloader(http_downloader.HttpDownloader):
def __init__(self, npm_registry, *list_args, workers=None):
super().__init__(*list_args, list_type='npm packages', workers=workers)
self._registry = npm_registry
def _download_item(self, item):
"""
Download npm package
:param item: http file to be downloaded (tuple: (npm_name@version, dst_dir))
"""
log.info('Downloading: {}'.format(item[0]))
npm_name, npm_version = item[0].split('@')
dst_path = '{}/{}-{}.tgz'.format(item[1], npm_name, npm_version)
try:
tarball = http_file.HttpFile(item[0], self._get_npm(*item[0].split('@')), dst_path)
tarball.save_to_file()
except Exception as err:
log.exception('Failed: {}'.format(item[0]))
if os.path.isfile(dst_path):
os.remove(dst_path)
raise err
log.info('Downloaded: {}'.format(item[0]))
@retry(stop_max_attempt_number=5, wait_fixed=5000)
def _get_npm(self, npm_name, npm_version):
"""
Download and save npm tarball to disk
:param npm_name: name of npm package
:param npm_version: version of npm package
"""
npm_url = '{}/{}/{}'.format(self._registry, npm_name, npm_version)
npm_req = self._make_get_request(npm_url)
npm_json = npm_req.json()
tarball_url = npm_json['dist']['tarball']
shasum = npm_json['dist']['shasum']
tarball_req = self._make_get_request(tarball_url)
tarball = tarball_req.content
if hashlib.sha1(tarball).hexdigest() == shasum:
return tarball
else:
raise Exception(
'{}@{}: Wrong checksum. Retrying...'.format(npm_name, npm_version))
def _is_missing(self, item):
"""
Check if item is missing (not downloaded)
:param item: item to check
:return: boolean
"""
return not os.path.isfile('{}/{}-{}.tgz'.format(self._data_list[item], *item.split('@')))
def run_cli():
"""
Run as cli tool
"""
parser = argparse.ArgumentParser(description='Download npm packages from list')
parser.add_argument('npm_list', metavar='npm-list',
help='File with list of npm packages to download.')
parser.add_argument('--registry', '-r', default='https://registry.npmjs.org',
help='Download destination')
parser.add_argument('--output-dir', '-o', default=os.getcwd(),
help='Download destination')
parser.add_argument('--check', '-c', action='store_true', default=False,
help='Check what is missing. No download.')
parser.add_argument('--debug', action='store_true', default=False,
help='Turn on debug output')
parser.add_argument('--workers', type=int, default=None,
help='Set maximum workers for parallel download (default: cores * 5)')
args = parser.parse_args()
if args.debug:
logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
else:
logging.basicConfig(stream=sys.stdout, level=logging.INFO, format='%(message)s')
downloader = NpmDownloader(args.registry, [args.npm_list, args.output_dir], workers=args.workers)
if args.check:
log.info('Check mode. No download will be executed.')
log.info(downloader.check_table)
sys.exit(0)
timer_start = timeit.default_timer()
try:
downloader.download()
except RuntimeError:
log.error('Error occurred.')
sys.exit(1)
finally:
log.info('Downloading finished in {}'.format(
datetime.timedelta(seconds=timeit.default_timer() - timer_start)))
if __name__ == '__main__':
run_cli()
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